The World Cup is not only football's biggest tournament, but it also serves as a shop window for players to impress onlooking clubs.
Manchester United's shocking season is finally over, and their fans can look forward to the summer with excitement. Manager David Moyes was sacked in April after a dismal ten month stint in charge at Old Trafford, and the announcement that Louis van Gaal will be the new manager has supporters looking forward with optimism.
Van Gaal must first complete his duties with the Dutch national team at this summer's World Cup, where he will get to see some of the finest talent around first hand. Some of those players on show could be potential targets for the former Bayern Munich and Barcelona coach, so here are five players in Group E who could be on United's radar.
Eliaquim Mangala, France
With Nemanja Vidic now an Inter Milan player and Rio Ferdinand also exiting the club, United have two huge holes to fill in the heart of their defence. Having impressed with Porto this season, the strong and athletic Mangala is unsurprisingly a target for the Red Devils. They may have to compete with Chelsea and Manchester City for his signature, and with a £35m price tag he won't come cheap, but the 23-year-old has bags of potential.
Paul Pogba, France
Losing Pogba has to be one of United's biggest mistakes in recent years after watching their former midfielder becoming a star with Juventus. Now an established member of the French midfield, Pogba is one of France's big hopes for the World Cup, and interest is growing with Juventus acknowledging that they may be forced to sell 21-year-old. Midfield is a huge area of concern for United and whilst Pogba would cost around £50m to bring back to Old Trafford, he'd be worth it.
Antoine Griezmann, France
The likes of Ashley Young, Antonio Valencia and Nani have been underwhelming out wide for United for around two years now, and van Gaal must look to add another winger this summer to supply Robin van Persie. With 16 goals this season for Real Sociedad, French winger Griezmann would certainly fit the bill. There is competition for his signature, but the 23-year-old has star potential.
Fabian Schar, Switzerland
The aforementioned departure of Vidic and Ferdinand leaves United short in the centre of defence, and a lesser-suggested name is Basel's Schar. The 22-year-old impressed for the Swiss outfit in the Champions League and United were reportedly watching his displays with intent. Tipped to star for Switzerland at this summer's tournament, more positive displays could put him on United's radar again.
Xherdan Shaqiri, Switzerland
United really do have to improve their options out wide this summer and having seen his first team opportunities with Bayern Munich dwindle, Shaqiri should be a target. The 22-year-old burst onto the scene against England in 2010 but struggles to start for Pep Guardiola's side, leading to speculation that he will seek a move away. Switzerland's star man would inject some pace and quality to United's flanks - and he should be available to buy this summer.